/* Copyright (c) 2011, 2023, Oracle and/or its affiliates.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */

// First include (the generated) my_config.h, to get correct platform defines.
#include "my_config.h"
#include <gtest/gtest.h>

#include "test_utils.h"
#include "fake_table.h"

#include "field.h"
#include "sql_time.h"
#include <my_decimal.h>

namespace field_unittests {

using my_testing::Server_initializer;
using my_testing::Mock_error_handler;

class FieldTest : public ::testing::Test
{
protected:
  virtual void SetUp() { initializer.SetUp(); }
  virtual void TearDown() { initializer.TearDown(); }

  THD *thd() { return initializer.thd(); }

  Server_initializer initializer;

  Field_set *create_field_set(TYPELIB *tl);
};


static void compareMysqlTime(const MYSQL_TIME& first, const MYSQL_TIME& second)
{
  EXPECT_EQ(first.year, second.year);
  EXPECT_EQ(first.month, second.month);
  EXPECT_EQ(first.day, second.day);
  EXPECT_EQ(first.hour, second.hour);
  EXPECT_EQ(first.minute, second.minute);
  EXPECT_EQ(first.second, second.second);
  EXPECT_EQ(first.second_part, second.second_part);
  EXPECT_EQ(first.neg, second.neg);
  EXPECT_EQ(first.time_type, second.time_type);
}

class Mock_table : public TABLE
{
public:
  Mock_table(THD *thd)
  {
    null_row= false;
    read_set= 0;
    in_use= thd;
  }
};

// A mock Protocol class to be able to test Field::send_binary
// It just verifies that store_time has been passed what is expected
class Mock_protocol : public Protocol
{
private:
  MYSQL_TIME t;
  uint p;
public:
  Mock_protocol(THD *thd) {}

  virtual bool store_time(MYSQL_TIME *time, uint precision)
  {
    t= *time;
    p= precision;
    return false;
  }

  void verify_time(MYSQL_TIME *time, uint precision)
  {
    compareMysqlTime(*time, t);
    EXPECT_EQ(precision, p);
  }

  // Lots of functions that require implementation
  int read_packet() { return 0; }
  ulong get_client_capabilities() { return 0; }
  bool has_client_capability(unsigned long client_capability) {return false;}
  void end_partial_result_set() {}
  int shutdown(bool server_shutdown= false) { return 0; }
  void *get_ssl() { return 0; }
  void start_row() {}
  bool end_row() { return false; }
  bool connection_alive() { return false; }
  void abort_row() {}
  uint get_rw_status() { return 0; }
  bool get_compression() { return false; }
  bool start_result_metadata(uint num_cols, uint flags,
                             const CHARSET_INFO *resultcs)
  { return false; }
  void send_num_fields(uint) {}
  void send_num_rows(uint) {}
  bool send_field_metadata(Send_field *field,
                           const CHARSET_INFO *charset) { return false; }
  virtual bool send_ok(uint server_status, uint statement_warn_count,
                       ulonglong affected_rows, ulonglong last_insert_id,
                       const char *message) { return false; }

  virtual bool send_eof(uint server_status,
                        uint statement_warn_count) { return false; }
  virtual bool send_error(uint sql_errno, const char *err_msg,
                          const char *sql_state) { return false; }
  bool end_result_metadata() { return false; }

  virtual bool store_null() { return false; }
  virtual bool store_tiny(longlong from) { return false; }
  virtual bool store_short(longlong from) { return false; }
  virtual bool store_long(longlong from) { return false; }
  virtual bool store_longlong(longlong from, bool unsigned_flag)
  { return false; }
  virtual bool store_decimal(const my_decimal *, uint, uint) { return false; }
  virtual bool store(const char *from, size_t length,
                     const CHARSET_INFO *fromcs) { return false; }
  virtual bool store(float from, uint32 decimals, String *buffer)
  { return false; }
  virtual bool store(double from, uint32 decimals, String *buffer)
  { return false; }
  virtual bool store(MYSQL_TIME *time, uint precision) { return false; }
  virtual bool store_date(MYSQL_TIME *time) { return false; }
  virtual bool store(Proto_field *field) { return false; }
  virtual enum enum_protocol_type type() { return PROTOCOL_LOCAL; };
  virtual enum enum_vio_type connection_type() { return NO_VIO_TYPE; }
  virtual int get_command(COM_DATA *com_data, enum_server_command *cmd)
  { return -1; }
};


TEST_F(FieldTest, FieldTimef)
{
  uchar fieldBuf[6];
  uchar nullPtr[1]= {0};
  MYSQL_TIME time= {0, 0, 0, 12, 23, 12, 123400, false, MYSQL_TIMESTAMP_TIME};

  Field_timef* field= new Field_timef(fieldBuf, nullPtr, false, Field::NONE,
				      "f1", 4);
  // Test public member functions
  EXPECT_EQ(4UL, field->decimals()); //TS-TODO
  EXPECT_EQ(MYSQL_TYPE_TIME, field->type());
  EXPECT_EQ(MYSQL_TYPE_TIME2, field->binlog_type());

  longlong packed= TIME_to_longlong_packed(&time);

  EXPECT_EQ(0, field->store_packed(packed));
  EXPECT_DOUBLE_EQ(122312.1234, field->val_real());
  EXPECT_EQ(122312, field->val_int());
  EXPECT_EQ(packed, field->val_time_temporal());

  my_decimal decval;
  my_decimal* dec= field->val_decimal(&decval);
  double res;
  my_decimal2double(0, dec, &res);
  EXPECT_DOUBLE_EQ(122312.1234, res);

  EXPECT_EQ(5UL, field->pack_length());
  EXPECT_EQ(5UL, field->pack_length_from_metadata(4));
  EXPECT_EQ(5UL, field->row_pack_length());

  String str(7);
  field->sql_type(str);
  EXPECT_STREQ("time(4)", str.c_ptr_safe());

  EXPECT_EQ(1, field->zero_pack());
  EXPECT_EQ(&my_charset_bin, field->sort_charset());

  // Test clone
  Field* copy= field->clone();
  EXPECT_EQ(field->decimals(), copy->decimals());
  EXPECT_EQ(field->type(), copy->type());
  EXPECT_DOUBLE_EQ(field->val_real(), copy->val_real());
  EXPECT_EQ(field->val_int(), copy->val_int());
  EXPECT_EQ(field->val_time_temporal(), copy->val_time_temporal());
  EXPECT_EQ(0, field->cmp(field->ptr, copy->ptr));

  // Test reset
  EXPECT_EQ(0, field->reset());
  EXPECT_DOUBLE_EQ(0.0, field->val_real());
  EXPECT_EQ(0, field->val_int());

  // Test inherited member functions
  // Functions inherited from Field_time_common
  field->store_time(&time, 4);
  EXPECT_EQ(4UL, field->decimals());
  EXPECT_EQ(MYSQL_TYPE_TIME, field->type());
  EXPECT_DOUBLE_EQ(122312.1234, field->val_real());
  EXPECT_EQ(122312, field->val_int());
  EXPECT_EQ(packed, field->val_time_temporal());

  String timeStr(15);
  EXPECT_STREQ("12:23:12.1234", field->val_str(&timeStr, &timeStr)->c_ptr());

  field->store_time(&time, 0);
  EXPECT_DOUBLE_EQ(122312.1234, field->val_real());  // Correct?

  MYSQL_TIME dateTime;
  MYSQL_TIME bigTime= {0, 0, 0, 123, 45, 45, 555500, false, MYSQL_TIMESTAMP_TIME};
  EXPECT_EQ(0, field->store_time(&bigTime, 4));
  EXPECT_FALSE(field->get_date(&dateTime, 0));

  make_datetime((Date_time_format *)0, &dateTime, &timeStr, 6);
  // Skip 'yyyy-mm-dd ' since that will depend on current time zone.
  EXPECT_STREQ("03:45:45.555500", timeStr.c_ptr() + 11);

  MYSQL_TIME t;
  EXPECT_FALSE(field->get_time(&t));
  compareMysqlTime(bigTime, t);

  Mock_protocol protocol(thd());
  EXPECT_EQ(protocol.connection_type(), NO_VIO_TYPE);
  EXPECT_FALSE(field->send_binary(&protocol));
  // The verification below fails because send_binary move hours to days
  // protocol.verify_time(&bigTime, 0);  // Why 0?

  // Function inherited from Field_temporal
  EXPECT_TRUE(field->is_temporal());
  EXPECT_EQ(STRING_RESULT, field->result_type());
  EXPECT_EQ(15UL, field->max_display_length());
  EXPECT_TRUE(field->str_needs_quotes());

  // Not testing is_equal() yet, will require a mock TABLE object
  //  Create_field cf(field, field);
  //  EXPECT_TRUE(field->is_equal(&cf));

  EXPECT_EQ(DECIMAL_RESULT, field->numeric_context_result_type());
  EXPECT_EQ(INT_RESULT, field->cmp_type());
  EXPECT_EQ(INT_RESULT, field->cmp_type());
  EXPECT_EQ(DERIVATION_NUMERIC, field->derivation());
  EXPECT_EQ(&my_charset_numeric, field->charset());
  EXPECT_TRUE(field->can_be_compared_as_longlong());
  EXPECT_TRUE(field->binary());
  // Below is not tested, because of ASSERT
  // EXPECT_EQ(TIMESTAMP_NO_AUTO_SET, field->get_auto_set_type());

  // Not testing make_field, it also needs a mock TABLE object

  EXPECT_EQ(TYPE_OK, field->store("12:23:12.123456", 15, &my_charset_numeric));
  EXPECT_DOUBLE_EQ(122312.1235, field->val_real());

  EXPECT_EQ(TYPE_OK, field->store_decimal(dec));
  EXPECT_DOUBLE_EQ(122312.1234, field->val_real());

  EXPECT_EQ(TYPE_OK, field->store(-234545, false));
  EXPECT_DOUBLE_EQ(-234545.0, field->val_real());

  {
    // Test that store() with a to big number gives right error
    Mock_error_handler error_handler(thd(), ER_TRUNCATED_WRONG_VALUE);
    EXPECT_EQ(TYPE_WARN_OUT_OF_RANGE, field->store(0x80000000, true));
    // Test that error handler was actually called
    EXPECT_EQ(1, error_handler.handle_called());
    // Test that field contains expecte max time value
    EXPECT_DOUBLE_EQ(8385959, field->val_real());  // Max time value
  }

  EXPECT_EQ(TYPE_OK, field->store(1234545.555555));
  EXPECT_DOUBLE_EQ(1234545.5556, field->val_real());

  // Some of the functions inherited from Field
  Field *f= field;
  EXPECT_EQ(TYPE_OK, f->store_time(&time, MYSQL_TIMESTAMP_TIME));
  EXPECT_DOUBLE_EQ(122312.1234, f->val_real());  // Why decimals  here?
  EXPECT_STREQ("12:23:12.1234", f->val_str(&timeStr)->c_ptr());
  EXPECT_STREQ("122312", f->val_int_as_str(&timeStr, false)->c_ptr());
  EXPECT_TRUE(f->eq(copy));
  EXPECT_TRUE(f->eq_def(copy));

  // Not testing store(const char, uint, const CHARSET_INFO *, enum_check_fields)
  // it requires a mock table

  Mock_table m_table(thd());
  f->table= &m_table;
  struct timeval tv;
  int warnings= 0;
  EXPECT_FALSE(f->get_timestamp(&tv, &warnings));
  EXPECT_EQ(123400, tv.tv_usec);

  delete field;

}

TEST_F(FieldTest, FieldTimefCompare)
{
  const int nFields= 7;
  uchar fieldBufs[nFields][6];
  uchar nullPtrs[nFields];

  MYSQL_TIME times[nFields]= {
    {0, 0, 0, 12, 23, 12, 100000, true,  MYSQL_TIMESTAMP_TIME},
    {0, 0, 0,  0,  0,  0,  10000, true,  MYSQL_TIMESTAMP_TIME},
    {0, 0, 0,  0,  0,  0,      0, false, MYSQL_TIMESTAMP_TIME},
    {0, 0, 0,  0,  0,  0, 999900, false, MYSQL_TIMESTAMP_TIME},
    {0, 0, 0,  0,  0,  0, 999990, false, MYSQL_TIMESTAMP_TIME},
    {0, 0, 0, 11, 59, 59, 999999, false, MYSQL_TIMESTAMP_TIME},
    {0, 0, 0, 12, 00, 00, 100000, false, MYSQL_TIMESTAMP_TIME}};

  Field* fields[nFields];
  uchar sortStrings[nFields][6];
  for (int i=0; i < nFields; ++i)
  {
    char fieldName[3];
    sprintf(fieldName, "f%c", i);
    fields[i]= new Field_timef(fieldBufs[i], nullPtrs+i, false, Field::NONE,
			       fieldName, 6);

    longlong packed= TIME_to_longlong_packed(&times[i]);
    EXPECT_EQ(0, fields[i]->store_packed(packed));
    fields[i]->make_sort_key(sortStrings[i], fields[i]->pack_length());
  }

  for (int i=0; i < nFields; ++i)
    for (int j=0; j < nFields; ++j)
    {
      String tmp;
      if (i < j)
      {
	EXPECT_GT(0, memcmp(sortStrings[i], sortStrings[j],
			    fields[i]->pack_length()))
	  << fields[i]->val_str(&tmp)->c_ptr() << " < "
	  << fields[j]->val_str(&tmp)->c_ptr();
	EXPECT_GT(0, fields[i]->cmp(fields[i]->ptr, fields[j]->ptr))
	  << fields[i]->val_str(&tmp)->c_ptr() << " < "
	  << fields[j]->val_str(&tmp)->c_ptr();
      }
      else if (i > j)
      {
	EXPECT_LT(0, memcmp(sortStrings[i], sortStrings[j],
			    fields[i]->pack_length()))
	  << fields[i]->val_str(&tmp)->c_ptr() << " > "
	  << fields[j]->val_str(&tmp)->c_ptr();
	EXPECT_LT(0, fields[i]->cmp(fields[i]->ptr, fields[j]->ptr))
	  << fields[i]->val_str(&tmp)->c_ptr() << " > "
	  << fields[j]->val_str(&tmp)->c_ptr();
      }
      else
      {
	EXPECT_EQ(0, memcmp(sortStrings[i], sortStrings[j],
			    fields[i]->pack_length()))
	  << fields[i]->val_str(&tmp)->c_ptr() << " = "
	  << fields[j]->val_str(&tmp)->c_ptr();
	EXPECT_EQ(0, fields[i]->cmp(fields[i]->ptr, fields[j]->ptr))
	  << fields[i]->val_str(&tmp)->c_ptr() << " = "
	  << fields[j]->val_str(&tmp)->c_ptr();
      }
    }
}


TEST_F(FieldTest, FieldTime)
{
  uchar fieldBuf[6];
  uchar nullPtr[1]= {0};
  MYSQL_TIME bigTime= {0, 0, 0, 123, 45, 45, 555500, false, MYSQL_TIMESTAMP_TIME};

  Field_time* field= new Field_time(fieldBuf, nullPtr, false, Field::NONE,
				     "f1");
  EXPECT_EQ(0, field->store_time(&bigTime, 4));
  MYSQL_TIME t;
  EXPECT_FALSE(field->get_time(&t));
  compareMysqlTime(bigTime, t);
}


const char *type_names3[]= { "one", "two", "three", NULL };
unsigned int type_lengths3[]= { 3U, 3U, 5U, 0U };
TYPELIB tl3= { 3, "tl3", type_names3, type_lengths3 };

const char *type_names4[]= { "one", "two", "three", "four", NULL };
unsigned int type_lengths4[]= { 3U, 3U, 5U, 4U, 0U };
TYPELIB tl4= { 4, "tl4", type_names4, type_lengths4 };


Field_set *FieldTest::create_field_set(TYPELIB *tl)
{
  Field_set *f= new (thd()->mem_root)
    Field_set(NULL,                             // ptr_arg
              42,                               // len_arg
              NULL,                             // null_ptr_arg
              '\0',                             // null_bit_arg
              Field::NONE,                      // unireg_check_arg
              "f1",                             // field_name_arg
              1,                                // packlength_arg
              tl,                               // typelib_arg
              &my_charset_latin1);              // charset_arg
  f->table= new Fake_TABLE(f);
  return f;
}


// Bug#13871079 RQG_MYISAM_DML_ALTER_VALGRIND FAILS ON VALGRIND PN PB2
TEST_F(FieldTest, CopyFieldSet)
{
  int err;
  char fields[]= "one,two";
  my_ulonglong typeset= find_typeset(fields, &tl3, &err);
  EXPECT_EQ(0, err);

  // Using two different TYPELIBs will set cf->do_copy to do_field_string().
  Field_set *f_to= create_field_set(&tl3);
  bitmap_set_all(f_to->table->write_set);
  uchar to_fieldval= 0;
  f_to->ptr= &to_fieldval;

  Field_set *f_from= create_field_set(&tl4);
  bitmap_set_all(f_from->table->write_set);
  bitmap_set_all(f_from->table->read_set);
  uchar from_fieldval= static_cast<uchar>(typeset);
  f_from->ptr= &from_fieldval;

  Copy_field *cf= new (thd()->mem_root) Copy_field;
  cf->set(f_to, f_from, false);
  cf->invoke_do_copy(cf);

  // Copy_field DTOR is not invoked in all contexts, so we may leak memory.
  EXPECT_FALSE(cf->tmp.is_alloced());

  delete f_to->table;
  delete f_from->table;
}


/*
  Tests that make_sort_key() is well behaved and does not cause buffer
  overruns nor writes a too short key. We stop at the first error seen.

  - field - The field whose make_sort_key() method we test.

  - from - A buffer of size field->pack_length() that we will trick
  the field into using as its record buffer.

  - expected - A buffer of size field->pack_length() + 1, the first n
  bytes of which make_sort_key() is expected to fill out. The n + 1:th
  byte is expected to be untouched. We try all possible values of n.

  - min_key_length - Some Field classes assert on a certain minimum
    key length. To avoid that, pass the minimum length here.
*/
void test_make_sort_key(Field *field, uchar *from, const uchar *expected,
                        int min_key_length)
{
  const uint pack_length= field->pack_length();
  Fake_TABLE table(field);
  table.s->db_low_byte_first= false;
  field->ptr= from;

  for (uint key_length= min_key_length; key_length <= pack_length; ++key_length)
  {
    uchar buff[MAX_FIELD_WIDTH + 1];
    memset(buff, 'a', pack_length + 1);
    field->make_sort_key(buff, key_length);

    // Check for a too short key.
    for (uint i= 0; i < key_length; ++i)
      ASSERT_FALSE(buff[i] == 'a')
        << "Too few bytes written at " << i
        << " with buffer size " << key_length << ".";

    // Check for wrong result
    for (uint i= 0; i < key_length; ++i)
      ASSERT_EQ(expected[i], buff[i])
        << "Wrong output at " << i
        << " with buffer size " << key_length
        << " and pack length " << pack_length << ".";

    EXPECT_EQ('a', buff[key_length])
      << "Buffer overrun" << " with buffer size " << key_length << ".";
  }

  // Try key_length == pack_length
  uchar buff[MAX_FIELD_WIDTH];
  memset(buff, 'a', pack_length + 1);
  field->make_sort_key(buff, pack_length);
  EXPECT_EQ('a', buff[pack_length]) << "Buffer overrun";
}


// Convenience function for large values.
void test_make_sort_key(Field *field)
{
  const int pack_length= field->pack_length();

  uchar from[MAX_FIELD_WIDTH];
  memset(from, 'b', pack_length);

  uchar to[MAX_FIELD_WIDTH + 1];
  memset(to, 'b', pack_length + 1);

  test_make_sort_key(field, from, to, 1);
}


extern "C"
{
  static size_t mock_strnxfrm(const CHARSET_INFO *, uchar *, size_t,
                              uint, const uchar *, size_t, uint);
}

class Mock_collation : public MY_COLLATION_HANDLER
{
public:
  Mock_collation() { strnxfrm= mock_strnxfrm; }
};


class Mock_charset : public CHARSET_INFO
{
  Mock_collation mock_collation;
public:
  mutable bool strnxfrm_called;
  Mock_charset() { strnxfrm_called= false; coll= &mock_collation; mbmaxlen= 1; }
  ~Mock_charset() { EXPECT_TRUE(strnxfrm_called); }
};


size_t mock_strnxfrm(const CHARSET_INFO *charset, uchar *, size_t dstlen, uint,
                     const uchar *, size_t, uint)
{
  // CHARSET_INFO is not polymorphic, hence the abomination.
  static_cast<const Mock_charset*>(charset)->strnxfrm_called= true;
  return dstlen;
};


void test_integer_field(Field *field)
{
  uchar from[MAX_FIELD_WIDTH], expected[MAX_FIELD_WIDTH];
  const int pack_length= field->pack_length();
  for (int i= 0; i < pack_length; ++i)
  {
    from[i]= '0' + i;
#ifdef WORDS_BIGENDIAN
    expected[i]= '0' + i;
#else
    expected[pack_length - 1 - i]= '0' + i;
#endif
  }
  test_make_sort_key(field, from, expected, pack_length);
}

// Tests all make_sort_key() implementations.

// We keep the same order of classes here as in field.h in order to make it
// easy to manually verify that all field types have been tested.

TEST_F(FieldTest, MakeSortKey)
{
  {
    SCOPED_TRACE("Field_decimal");
    Field_decimal fd(NULL, 64, NULL, '\0', Field::NONE, "", 0, false, false);
    test_make_sort_key(&fd);
  }
  {
    SCOPED_TRACE("Field_new_decimal");
    Field_new_decimal fnd(64, true, "", 0, false);
    test_make_sort_key(&fnd);
  }
  {
    SCOPED_TRACE("Field_tiny");
    Field_tiny ft(NULL, 0, NULL, '\0', Field::NONE, "", false, true);
    test_make_sort_key(&ft);
  }
  {
    SCOPED_TRACE("Field_short");
    Field_short fs(0,false, "", true);
    test_integer_field(&fs);
  }
  {
    SCOPED_TRACE("Field_long");
    Field_long fl(0,false, "", true);
    test_integer_field(&fl);
  }
  {
    SCOPED_TRACE("Field_longlong");
    Field_longlong fll(NULL, 64, NULL, '\0', Field::NONE, "", 0, true);
    test_integer_field(&fll);
  }
  {
    SCOPED_TRACE("Field_float");
    Field_float ff(NULL, 0, NULL, '\0', Field::NONE, "", 0, false, false);
    float from= 0.0;
    uchar to []= { 128, 0, 0, 0 };
    test_make_sort_key(&ff, reinterpret_cast<uchar*>(&from), to, 4);
  }
  {
    SCOPED_TRACE("Field_double");
    Field_double fd(NULL, 0, NULL, '\0', Field::NONE, "", 0, false, false);
    double from= 0.0;
    uchar expected []= { 128, 0, 0, 0, 0, 0, 0, 0 };
    test_make_sort_key(&fd, reinterpret_cast<uchar*>(&from), expected, 1);
  }
  {
    SCOPED_TRACE("Field_null");
    CHARSET_INFO cs;
    cs.state= MY_CHARSET_UNDEFINED; // Avoid valgrind warning.
    Field_null fn(NULL, 0, Field::NONE, "", &cs);
    test_make_sort_key(&fn);
  }
  {
    SCOPED_TRACE("Field_timestamp");
    Field_timestamp fts(false, "");
    test_integer_field(&fts);
  }
  {
    SCOPED_TRACE("Field_timestampf");
    Field_timestampf
      ftsf(NULL, NULL, 0, Field::NONE, "", DATETIME_MAX_DECIMALS);
    test_make_sort_key(&ftsf);
  }
  {
    SCOPED_TRACE("field_newdate");
    Field_newdate fnd(false, "");
    uchar from []= { '3', '2', '1' };
    uchar expected []= { '1', '2', '3' };
    test_make_sort_key(&fnd, from, expected, 3);
  }
  {
    SCOPED_TRACE("Field_time");
    Field_time ft(false, "");
    uchar from []= { 3, 2, 1 };
    uchar expected []= { 129, 2, 3 };
    test_make_sort_key(&ft, from, expected, 3);
  }
  {
    SCOPED_TRACE("Field_timef");
    Field_timef ftf(false, "", 0);
    test_make_sort_key(&ftf);
  }
  {
    SCOPED_TRACE("Field_datetime");
    Field_datetime fdt(NULL, NULL, '\0', Field::NONE, NULL);
    test_integer_field(&fdt);
  }
  {
    SCOPED_TRACE("Field_string");
    Mock_charset mock_charset;
    Field_string fs(NULL, 0, NULL, '\0', Field::NONE, "", &mock_charset);
    uchar to;
    fs.make_sort_key(&to, 666);
  }
  {
    SCOPED_TRACE("Field_varstring");
    Mock_charset mock_charset;
    Fake_TABLE_SHARE fake_share(0);
    uchar ptr[8]= {0, 0, 0, 0, 0, 0, 0, 0};
    Field_varstring fvs(ptr, 0, 0, NULL, '\0', Field::NONE, "", &fake_share,
                        &mock_charset);
    uchar to;
    fvs.make_sort_key(&to, 666);
  }
  {
    SCOPED_TRACE("Field_blob");
    CHARSET_INFO cs;
    cs.state= MY_CHARSET_UNDEFINED; // Avoid valgrind warning.
    Field_blob fb(0, false, "", &cs, false);
  }
  {
    SCOPED_TRACE("Field_enum");
    for (int pack_length= 1; pack_length <= 8; ++pack_length)
      for (int key_length= 1; key_length <= 8; ++key_length)
      {
        Field_enum fe(NULL, 0, NULL, '\0', Field::NONE, "", pack_length, NULL,
                      &my_charset_bin);
        uchar from []= { '1', '2', '3', '4', '5', '6', '7', '8' };
        uchar expected []=
#ifdef WORDS_BIGENDIAN
          { '1', '2', '3', '4', '5', '6', '7', '8' };
        test_make_sort_key(&fe, from, expected, key_length);
#else
          { '8', '7', '6', '5', '4', '3', '2', '1' };
        test_make_sort_key(&fe, from, expected + 8 - pack_length, key_length);
#endif
      }
  }
  {
    SCOPED_TRACE("Field_bit");
    Field_bit fb(NULL, 0, NULL, '\0', NULL, '\0', Field::NONE, "");
  }
}


void testCopyInteger(bool is_big_endian, bool is_unsigned)
{
  const uchar from_template[]= { '1', '2', '3', '4', '5', '6', '7', '8' },
    expected_for_big_endian[]= { '1', '2', '3', '4', '5', '6', '7', '8' },
      expected_for_little_endian[]= { '8', '7', '6', '5', '4', '3', '2', '1' };

  const size_t max_length= sizeof(from_template);
  for (uint from_length= 1; from_length < max_length; ++from_length)
    for (uint to_length= 1; to_length <= from_length; ++to_length)
    {
      uchar to[]= { '0', '0', '0', '0', '0', '0', '0', '0', '0' };
      uchar from[max_length];
      memcpy(from, from_template, max_length);

      if (is_big_endian)
        copy_integer<true>(to, to_length, from, from_length, is_unsigned);
      else
        copy_integer<false>(to, to_length, from, from_length, is_unsigned);

      EXPECT_EQ('0', to[to_length])
        << "Buffer overrun @ position " << to_length << ".";

      ASSERT_EQ(is_unsigned ? 0 : 128, to[0] & 128)
        << "Sign bit should" << (is_unsigned ? " not" : "") << " be flipped";

      const uchar *expected=
        is_big_endian ? expected_for_big_endian :
        expected_for_little_endian + max_length - from_length;

      for (uint i= 1; i < to_length; ++i)
      {
        ASSERT_FALSE(to[i] == '\0')
          << "Too few bytes written @ position " << i
          << " when copying a size " << from_length << " integer into a size "
          << to_length << " integer.";

        ASSERT_EQ(expected[i], to[i])
          << "Result differs at position " << i
          << " when copying a size " << from_length << " integer into a size "
          << to_length << " integer.";
      }
    }
}


// Test of the copy_integer<>() function.
TEST_F(FieldTest, copyInteger)
{
  {
    SCOPED_TRACE("Big endian unsigned");
    testCopyInteger(true, true);
  }
  {
    SCOPED_TRACE("Big endian signed");
    testCopyInteger(true, false);
  }
  {
    SCOPED_TRACE("Little endian unsigned");
    testCopyInteger(false, true);
  }
  {
    SCOPED_TRACE("Little endian signed");
    testCopyInteger(false, false);
  }
}


}

#include "field_date-t.cc"
#include "field_datetime-t.cc"
#include "field_long-t.cc"
#include "field_newdecimal-t.cc"
#include "field_timestamp-t.cc"